Re: WHY CANT I GET AIR TRAFFIC CONTROL OR AIRCRAFT ON MY...
The only thing you can do about this problem is to buy a Uniden product.However the problem about this is that it does not get all frequencies unlike this model.
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it is the relative direction around the aircraft using a clock face. 12 oclock is in front of the pilot, 6 oclock behind. 3 oclock to the right etc. it is also used with high, level or low. for example, a contact off to the right and above the flight level of the pilots aircraft would be 2 oclock high.
The main system control memory IC is faulty. This IC, a small one with 8 solder terminals, can be located very near to the main system control IC. Will look like somewhat like these. A very cheap IC to buy. Usually will start up with a number 24C**. Note this number. It is very important when replacing it. In some cases, there must have some adjustments should be done after replacement. If you wish to know more http://electronicshelponline.blogspot.com/ check this link. It has some details about it. Pull up older posts there, either by its left side bar, or
see it in Timslide option.
Hello sounds like the memory IC to the TV has damaged. It is an IC, which stores all the cunsumer adjusted data, as digital signals, and retrives thme to the main system control IC, each time the set is switched ON. It is an 8 solder terminal one, a small IC. Even though, its size is small, function of this part is very crtical, when the set works. This IC can be located very near to the main system control IC, and can be bought from most of the electronic spare part selling shops at your town. The only thing you need is, to locate this component on main baord, and desolder it out, and resolder a new one in place. Somewhat skilled work indeed.
your have problem with the system IC's which store the channel and all the control in the TV or it can be remedy by soldering the pin of the IC's if the problem persist well your have to replace that system.
When autotuning the set goes throughs all transmitting channels, shows to be receiveing all channles, but seems to be tunes indefinitely, and no channels are locked, the memory IC inside the set has got damaged. In normal case, the TV will tune to all available channels at that tiime, in air or through the cable, whatever the case may be, tune up to last channel, and will stop, and will display the first channel it has got. Then we have to make adjustments on channels.
The memory IC i stated above is a small IC with 8 terminals, and can be located very near to system control Ic, at system control section. In some sets, it will be SMD type [Surface Mount Device], and in otheres will be of DIL type [Dual In Line]. If it is a DIL type, it is very easy to replace. If it is SMD type, proper care should be taken when replacing it, not to damage any track on circutit board and nearby components.
Open your TV, locate the IC and desolder it out of the printed circuit board, go for a same type and number, replace it. This will solve your problem.
OK.
to store a fcy press BAND to go to your fcy range ie 118.000 airband
dial your fcy ie 127.900(shanwick ocean area control) press and hold V/M for 1 sec, small numbers now blink, dial the memory slot you wish to store into ie 001 then press V/M again for 1sec and this will store 127.900 into mem slot 001. make a list:-
mem number / fcy / mode(am - fm) / station / bank
to prog a fcy into a "bank", press V/M for 1sec - blinking mem numbers - dial mem number ie 001(127.900) press MODE - "bank" flashes past-
-- -- -- -- 001 shows, turn dial to show A-00 this is the first "bank", pressing BAND scrolls through all the alpha "banks" - choose one.. ie A-00 (for airband..) press V/M this puts mem 001 into "bank" A mem slot 00, there are 100 slots in each letter 00 to 99. do this to any fcy you want to scan as a group.
to scan a bank press V/M - small numbers appear -
press BAND to scroll through any "banks" you have created ie A B C D etc (only banks with fcys in will display), press MODE -"bank"- press MODE again and you will start scanning just that "bank" of mem slots.
MODE starts and stops the scan... each letter holds 100 mem slots.. happy scanning!!!
This is a problem with any scanner which has no keypad..
First set the squelch (gets rid of the hissing noise and allows the radio to scan) to do this....
On the side are 2 buttons, the bottom one is monitor. press and hold then look at the display, turn the top dial until "AUTO" appears,
The squelch should now keep the radio quiet.
Now the tuning step.. You need to set this because if your radio was on 450.000 and you wanted to listen to 450.012.5 you would miss it if your radio was making 000.025 "steps". IE you would need 12.5 steps. This is the most common step used by ambulance etc in the UK, you will need to check local band plans. Stick with 12.5 and you should get most stuff on VHF / UHF. For airband 12.5 will get most stuff, but some is now changing to 8.33. For HF (below) 136 Mhz I'd use 5
To set the step....
On the front there are 4 big buttons. press [V/M.S.MW.SKIP] to select VFO mode, then press [BAND.LOCK] to select the band you want to listen to, then press [TS.SET] to enter the step turn the dial to select your step (stick with 12.5 for now) press [TS.SET] to exit back to VFO mode
To scan...
First set the scan type... On the front there are 4 big buttons. Press and hold the one that says [MODE.SCAN] for 2 seconds and look at the display, turn the top dial until the screen reads ALL, press [MODE.SCAN] again and the radio should start to scan with the 12.5 steps you set earlier. If you want to change scan direction, just turn the top dial. If you want to stop the scan, just press [MODE.SCAN].
When you hear something interesting, make a note of the frequency on the display.
To set memories (store frequencies).....
On the front there are 4 big buttons. press [V/M.S.MW.SKIP] to select VFO mode,
to get close to the frequency you made a note of, press [BAND.LOCK] Then set the actual frequency with the top dial, press and hold [V/M.S.MW.SKIP] for 2 seconds to select memory write mode (1 short and 1 long beep) turn the top dial to select which channel you would like to overwrite. Start with 01. press [V/M.S.MW.SKIP] for 2 seconds. ( 3 beeps )
Thats it!
Any more problems just post on here and either me or someone else will help.
The first problem was always standby mode.... get back the original eprom IC 24CO8WP in to the PCB, then find the original remote control of you TCL Tv tcl-14175 then you power On In the Remote control while your TV is in Standby mode! then you see your tv is going ON... Because your unit is in Child lock Mode....
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